Questions tagged [reactivity]

Applied to a chemical species, the term expresses a kinetic property in reference to another species. The tag should be applied to questions seeking answers with respect to the reactivity (or unreactivity) of a certain chemical compound, species, molecular entity and/or functional groups. It must not be applied to questions about the stability of certain chemical species.

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Why do the induction effects of fluorobenzene decrease electrophilic addition reactivity, conjugation effects increase selectivity?

Fluorobenzene shows signs of both the electron withdrawing and electron donating groups on benzene. Electrophilic substitution to the ring is less reactive because the fluorine is very electronegative ...
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69 views

Where will a H+ attack on 6-hydroxyhexan-2-one? [closed]

Where will a H+ attack on 6-hydroxyhexan-2-one? Protonation can take place either on the ketone or the alcohol. So where will it attack? In short, on which of the two oxygen atoms is electron density ...
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701 views

Is benzyl chloride or allyl chloride more reactive?

What compound is more reactive, benzyl chloride [(chloromethyl)benzene] or allyl chloride (3-chloroprop-1-ene)? I know that both have a higher reactivity than alkyl and aryl chlorides.
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What is the most likely reaction between minocycline and tramadol in physiological conditions?

Minocyline (left) and Tramadol (right) are two commonly prescribed medications containing typical organic functional groups. What would an expert chemist surmise as the first or most-likely reaction ...
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331 views

Why are thioethers not better leaving groups than ethers?

Why are thioethers ($\ce{RSR}$) not better leaving groups than ethers ($\ce{ROR}$)? I learnt that better bases are poorer leaving groups. Here, clearly the poorer base is thioether, as the lone pair ...
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159 views

Can activated charcoal retain adsorbtion properties even when submerged in liquids?

This is following a question on Skeptics Stackexchange, where apparently medical science claims that activated charcoal can adsorb poison when ingested. One of the members posted a related question on ...
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1answer
532 views

Carbylamine Reaction

In my lab manual, it is given that alcoholic KOH should be the base used in carbylamine test. However as it was not available, I used 10℅ NaOH. The test results came out positive. (Yes, it was ...
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1k views

Naphthalene v/s Anthracene reactivity

Both have similar resonance energy per ring, even Naphthalene has a little higher Resonance energy (127.5 KJ per mol per ring v/s 127 KJ per mol per ring ) Can we prove , why there is a small ...
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254 views

Ketal formation of ethyl acetoacetate

Why does the ketone carbonyl group react in preference to the ester carbonyl? Is it something to do with the resonance occurring into the ester carbonyl from the oxygen? but how does this make the ...
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209 views

Electrophilic substitution in phenyl alkyl ether

Phenylalkyl ethers undergo usual halogenation in the benzene ring, e.g., anisole undergoes bromination with bromine in ethanoic acid even in the absence of iron (III) bromide catalyst. Why do we use ...
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286 views

How to calculate minimum temperature of a reaction?

For burning ethanol (its reaction with oxygen), we need a minimum activation energy (a minimum temperature) to start the reaction. Is it possible to calculate what are the minimum temperatures ...
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237 views

Why are trifluoromethyl diazirines so stable?

Why are trifluoromethyl diazirines so stable? Trifluoromethyl diazirines stability is well documented, however I am yet to find an explanation of why... Can it be homoaromatic or even aromatic? 2 pie ...
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254 views

Primary amine versus phosphoramidate reactivity with succinate esters

I have posted two reactions below. The top reaction is well known and occurs readily and near quantitatively (e.g. in protein modification), while the bottom reaction to my knowledge does not exist in ...
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11k views

Rate of EAS in chlorobenzene and fluorobenzene

In both chlorobenzene and fluorobenzene, both the halogens show a −I effect where fluorine has more electron withdrawing effect than chlorine. Now, if we consider the mesomeric/resonance effect, ...
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100 views

How to dissolve calcium sulfate fast?

I would like to dissolve $\ce{CaSO4}$ in a hardened condition (e.g. gypsum board) as fast as possible. I have seen in posts about $\ce{CaSO3}$ that vinegar and sulfamic acid are able to dissolve it. ...
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259 views

Graphical representation of reductive powers of NaBH4 and LiAlH4?

I don't know whether this is a valid question, I will delete it if it is inappropriate. I am looking for a graphical representation of the reductive powers of $\ce{NaBH4}$ and $\ce{LiAlH4}$. Such as ...
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1answer
19k views

Why is the reactivity of primary alkyl halides with nucleophiles (SN2 mechanism) greater than secondary and tertiary alkyl halides?

For the reaction between alkyl halide and a nucleophile, following the SN2 mechanism, the reactivity of alkyl halides is in the order: primary halide > secondary halide > tertiary halide. If you ...
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1answer
987 views

Electrophilic addition of HX to 2,3-dimethylbut-2-ene

Generally, for the addition of dry HX to an alkene, it follows Markovnikov's rule. The hydrogen atom adds to the carbon with the most hydrogen atoms. However, in the case of an alkene which does not ...
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1answer
105 views

Can formaldehyde be stored at a higher temperature than room temperature?

I have studied that formaldehyde stored at temperature lower than room temperature convert into 1,3,5-oxane. So, it's not stored at colder temperatures. But my question is - Can a similar degrading ...
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801 views

Reactivity of Alkanes

Does the tetrahedral structure of the alkanes contribute to their lower reactivity? I thought that because a tetrahedral structure suggests ${sp^3}$ hybridization, it should contribute to its lower ...
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2answers
941 views

Why does silicon not react with dioxygen?

Why does silicon not react with dioxygen? I'm doing an organic lab experiment. I'm heating up silicon, carbon, and sulfur individually then placing them in pure $\ce{O2}$. I don't really know about ...
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1answer
85 views

Nucleophilicity of alcoxy groups

I found a nucleophilicity order as $\ce{HO-} > \ce{CH3-O-} > \ce{(CH3)2CH-O-} > \ce{(CH3)3C-O-}$ The reason was given that bulky groups reduce nucleophilicity. But why? The order of the $+...
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1answer
76 views

Is there anything that can react with molecular gaseous nitrogen? [closed]

I am looking for something to react with nitrogen in the air. Is there any substance that can react fast with molecular nitrogen at room temperature?
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1answer
12k views

Is there a reaction between ethanol and aluminum?

Is there a potential reaction that would occur between ethanol and aluminum? If so, would it potentially create anything toxic?
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929 views

Grignards do transmetallation?

Grignards don't add to alkyl halides to create linear carbon extensions because Grignards do transmetallation rather than SN2 displacement of halide. Is this correct? I thought transmetallation a) ...
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1answer
243 views

Order of reactivity of hydrogen halides

Solomon and Fryhle $11^{th}$ edition says : Order of reactivity of HX in the acid catalyzed conversion of alcohols to alkyl halides follows the order : HI>HBr>HCl We can account for this by saying ...
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170 views

With which 2 of these 5 chemicals would Chlorine not react? N, NaOH, O2, NaBr, Fe

A question in a Russian EGE test asks to choose 2 chemicals out of 5 with which Chlorine does not react: Nitrogen - I checked and it reacts $\ce{KOH}$ -- reacts $\ce{O2}$ -- reacts $\ce{NaBr}$ -- ...
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How are reactivity and dipole moment related?

Recently, I came across a question: which of the two compounds has a greater reactivity; $\ce{NH_{3}}$ or $\ce{NF_{3}}$? It is known that despite the same structure the dipole moment of $\ce{NH_{3}}$...
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1answer
125 views

Can the 1st generation Grubbs Catalyst be used for ring closing metathesis on non-terminal alkenes?

I'm wondering if the 1st generation Grubbs catalyst can be used to do ring closing metathesis on a non-terminal alkene.
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1answer
134 views

Electrophilic Addition Reaction

When HBr reacts with ethene it proceeds by the attack of proton on Ethene to give Ethyl carbocation and then attack of nucleophilic bromide ion to give Bromoethane. My question is why does the proton ...
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1answer
330 views

Gilmans and carbon dioxide

I know that Grignards react with carbon dioxide to give carboxylate anions. But will Gilmans do the same? Will Gilmans react with carbon dioxide in a productive fashion?
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1answer
356 views

Reaction between NaOH and Carbonic acid

I was presented with the following reaction when we were just learning about acids and bases: $$\ce{2NaOH + H2CO3 -> H2O + Na2CO3}$$ however I had thought it might've been something like $$\ce{...
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82 views

Reactivity of fluorine compound

I have tried to make sense of the article on fluorine on Wikipedia but I am still very perplexed. I would like to know generally how reactive the fluorine compound β-(4-Fluorophenyl)-γ-aminobutyric ...
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1answer
1k views

Why are not all metals included in the reactivity series

Why aren't all metals included in the activity series ? For example why isn't molybdenum included ? Now we know that hydrogen displaces those metals from their oxides that are less reactive than iron. ...
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1answer
349 views

Having trouble understanding activity series of metals & electronegativity

I want to know how do metals replace hydrogen in a substance such as water. Isn't water happy with its configuration? It has shared enough electrons so that both hydrogen and oxygen complete their ...
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1answer
316 views

Lab test to compare the reactivity of liquid 1-heptene and liquid heptane

Describe how you would carry out a lab test to compare the reactivity of liquid 1-heptene and liquid heptane. State clearly what the possible results of the test are and what they would indicate. ...
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1answer
128 views

Can alkyl-substituted phenols be reduced to alkyl-substituted benzenes by zinc dust?

I know that phenol can be reduced to benzene by distilling it with zinc dust. But I want to know if that concept can be expanded. E.g., take chavicol or 4-(prop-2-en-1-yl)phenol; could you still ...
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1answer
3k views

Why is Nitric Acid more reactive and caustic than Sulfuric or Hydrochloric?

Nitric acid reacts much more vigorously with living tissue and is a obviously more immediately hazardous on contact than sulfuric or hydrochloric. What is the reason for this? Is it due to the ...
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2answers
183 views

Formal charges can mislead when writing arrow-pushing mechanisms

We know opposing charges attract and like charges repel. By this logic then, in the two examples on the left, the curved arrows would be show the formation of an oxygen-oxygen bond. However, these ...
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1answer
3k views

Why do displacement reactions occur?

Suppose we have a compound, say copper sulfate. I know that sulfate is a poly-atomic ion, having valency 2. And, in this case, copper also has valency 2. So, to fullfill their 'octet' requirements, ...
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1answer
120 views

Predicting reaction among compounds [closed]

Suppose I have a group of organic compounds say A, B, C, D, E, F, G, H. I know their chemical formula and their names. Now there exists a reaction among these compounds but we do not know which ...
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1answer
125 views

Grignards and diatomic halogens

Can Grignards react with diatomic halogens as to perform an substitution reaction? I'd imagine that the first part of making the reaction work - polarizing the halogen as to prepare to pull it apart -...
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1answer
67 views

Equation for reaction between chlorine fluoride and potassium bromide

The equation given in the answer key was $$\ce{ClF + 2KBr → KCl + KF + Br2}$$ However won't the $\ce{KCl}$ also react with $\ce{ClF}$ to form $\ce{KF}$ and $\ce{Cl2}$, resulting in the net reaction ...
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1answer
25 views

Would atomic oxygen and atomic hydrogen result in O2 and H2 only, or some H2O too? [closed]

Let's assume we have atomic oxygen and atomic hydrogen in a closed chamber, the temperature and pressure of which we're able to monitor (and control). Number of hydrogen atoms are twice that of oxygen....
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1answer
86 views

Can nitrogen dioxide react with plastics of any kind? [closed]

I have searched a lot on the internet but couldn't find any helpful thing. My question is that can nitrogen dioxide react with plastics of any kind?
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1answer
227 views

Can hydrobromic acid perform substitution with propane?

I am a student in the 11th grade, we recently had a chemistry exam, I lost marks because of a question that asks about the reaction between $\ce{HBr}$ and $\ce{C3H8}$. According to our teacher $\ce{...
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1answer
730 views

Rate of reaction with HBr [closed]

Rate of reaction is more when Carbon is more electrophile(less electron density) So according to me the order should be D>B>C>A As NO2 has -M -I effect , Cl has +M -I effect , while OCH3 has +M -I ...
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1answer
3k views

Water with Sodium VS Alcohols with Sodium

Why is the reaction between water and sodium more vigorous than that between ethanol and sodium? Also, why does the reaction between sodium and an alcohol becomes less vigorous the longer the ...
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1answer
4k views

What is the difference between activity and reactivity when discussing elements?

I screwed up on a true/false question that stated that lithium is the most active alkali metal. I answered false, because I remembered that the lower you go in this group, the more explosive the ...
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3answers
1k views

Why would the hydrogen sulfide ion be a better nucleophile than a bromide ion?

Why would the hydrogen sulfide ion be a better nucleophile than a bromide ion? My professor says that hydrogen sulfide ion is a better nucleophile. I thought I could determine the better ...